Improvement in dies for forming plowshares



G. H. THOMPSON.

Dies for Forming Plow-Shares;

,N0.152,578, PatentedJune30,187 4'.

WITNESSES. INVENTUH aw/z 4 #W gles thereto.

the shoulder I), just at its junction with the UNITED STATES PATENTOFFICE.

CHARLES H. THOMPSON, OF MOLINE, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHTTO JNO. VANLURANOE, OF SAME PLACE.

IMPROVEMENT IN DIES FOR FORMING PLOWSHARES.

Specification forming part of Letters Patent No. 152,578. dated June 30,1874; application filed April 21, 1874.

To all whom it may concern.-

Be it known that I, O. H. THOMPSON, of Moline, in the county of RockIsland and State of Illinois, have invented certain new and usefulImprovements in Dies for Forming Plowshares; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings, whichform part of this specification.

The nature of my invention relates to an improvement in dies for formingplowshares and it consists in the peculiar formation of the dies,whereby the shares are upset or formed at a single blow of the die, aswill be more fully described hereafter.

The accompanying drawings represent my invention.

Arepresents the bed-plate or base of the die, which consists of a blockof metal having a portion of its upper surface removed so as to form thevertical shoulder b, and the bottom 0 of the die, extending at right an-Extending out from the side of bottom, is a second smaller shoulder, d,of the shape shown, and against which the share is formed. Upon the edgeof the block (1, extending up above the level of the bottom 0, is a lugor projection, 0, between which and the shoulder d the flat plate g, outof which the share is to be formed, is placed and held in position.Across the rear end of the die is placed the gage plate i, which can bead justed back and forth at will by the setscrew h, so as to regulatethe amount of curve the share shall have at its point. The upper part ofthe die is formed from the block j, which has a portion of. its undersurface cut away, so as .to form the vertical shoulder I, whichcorresponds to the vertical edge on of the block a and the fiat surfaceit, which projects over the bottom 0. On the under side of the fiatsurface a is formed the shoulder 0, of the shape shown, and which forcesthe pointed end of the share or plate 9 over against and around thecurved edge of the shoulder d. The plate g, from which the share isformed, is first cut or stamped into the shape shown in Fig. 3 thenheated and placed in the die, when by a single stroke of the drop itspoint is upset and the share formed complete.

Having thus described my invention, I claim 1. The construction of thedies a j, having the shoulders (I 0, substantially as shown.

2. In combination with the dies (0 j, theadjustable gage i and screw it,substantially as specified.

In testimony that I claim the foregoing I have hereunto set my hand this15th day of April, 1874.

CHARLES H. THOMPSON.

- Witnesses:

. EUGENE LEWIS,

JOHN VANLURANCE.

